Function isFetchable

plugins/prefetch/plugin.cc:443–458

* @brief Checks if we are still supposed to schedule a background fetch based on whether the object is in the cache. * It is 'fetchable' only if not a fresh hit. * * @param txnp HTTP transaction structure * @param data transaction data * @return true if fetchable and false if not. */

 * @return true if fetchable and false if not.
 */
static bool
isFetchable(TSHttpTxn txnp, PrefetchTxnData *data)
{
  bool          fetchable = false;
  BgFetchState *state     = data->_inst->_state;
  if (!foundFresh(txnp)) {
    /* Schedule fetch only if not in cache */
    PrefetchDebug("object to be fetched");
    fetchable = true;
  } else {
    PrefetchDebug("object already in cache or to be skipped");
    state->incrementMetric(FETCH_ALREADY_CACHED);
    state->incrementMetric(FETCH_TOTAL);
  }
  return fetchable;
}

/**
 * @brief Find out if the current response to trigger a background prefetch.